<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>梯形</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        html,
        body {
            width: 100%;
            height: 100%;
            background: #cccccc;
        }

        .container {
            width: 60%;
            height: 100px;
            position: absolute;
            background: #eeeeee;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
        }

        .left>div {
            background: #ffffff;
        }

        .left,
        .right {
            position: relative;
            width: 50%;
            height: 100%;
            float: left;
        }

        .left>div,
        .right>div {
            position: absolute;
            top: 0;
            display: inline-block;
            width: 50%;
            height: 100%;
            float: left;
        }

        .left-left {
            width: 70% !important;
            left: 0;
        }

        .clear::after {
            content: "";
            width: 0;
            height: 0;
            clear: both;
        }

        .radius {
            transform: skewX(30deg);
            border-top-right-radius: 30px;
            box-shadow: 10px 0px 8px -1px #aaa;
            right: 0;
        }
    </style>
</head>

<body>
    <div class="container">
        <div class="left">
            <div class="left-left"></div>
            <div class="clear radius"></div>
        </div>
        <div class="right clear">

        </div>
    </div>
</body>

</html>